Oliver Lestrange
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Awarded to Oliver Lestrange on 10 Aug 2020
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Question
How to solve this system equation?
Hi, I am trying to solve the following system. I've tried with some functions but vpasolve is the only I found out that doesn't...
presque 4 ans il y a | 1 réponse | 0
0
réponseQuestion
How to remove everything that is grey (127, 127, 127) from an image?
Hi, I want to remove everything with the rgb color (127, 127, 127) from an image. I am using externalMask = planta.img(:,:,1)=...
presque 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How to make this loop faster?
Hello, The following code takes 30 seconds to execute. I can't make it any faster. Any suggestion? Thanks! function [ at] ...
presque 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Putting a step in x axis
Hi, I'm trying to put the x axis with a step of 50 nm, but the output is 0 to 350 nm instead of 0 to 3600 nm. subplot(2,1,2); ...
presque 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Error with an empty array - Subscript indices must either be real positive integers or logicals
Hi, I'm getting an error show bellow. The reason it's because altura_raio_direto is getting an empty array. As you can see, hei...
environ 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Undefined function or variable 'fabs'
Hi, I'm getting this error: "Undefined function or variable 'fabs'." The code is: for z=1:length(altura_raio_direto) ...
environ 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How to make a for faster?
Hi, I've the following code. ix = ismember(idx_x(:),x(:)); iy = ismember(idx_y(:),y(:)); minimum = min(ix,iy); for idx_=1:...
environ 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
Save coordinates in an array
Hi, I am itereting two loops, in order to form coordinates. I am trying to save them with this line, because I want to keep i...
environ 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Random variable with log-normal distribution
Hi, I need to calculate a random variable with log-normal distribution with zero mean and standard deviation of 4 dB. How can ...
environ 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How to wait for a button to be pressed?
Hi, I have the following code: % --- Executes on button press in insertAntenna. function insertAntenna_Callback(hObject, even...
plus de 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
Error using normcdf function
Hi, I am trying to make a CDF. I am using the array eixoXX. % --- Executes on button press in densityButton. function densi...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How PDF and CDF work?
Hi, I need to make a pdf and cdf. I saw the documentation but I didn't understand how exactly can I used it. I have power va...
plus de 4 ans il y a | 1 réponse | 0
0
réponseQuestion
Why bar function is so slow?
Hi, I am using the following code. function densityButton_Callback(hObject, eventdata, handles) % hObject handle to densit...
plus de 4 ans il y a | 1 réponse | 0
0
réponseQuestion
How to make a Manhattan Grid?
Hi, I need to make a Manhattan Grid. The mandist fucntion can do this? I am using matlab version R2016a. Important notic...
plus de 4 ans il y a | 1 réponse | 0
0
réponseQuestion
How to make a matrix has more pixels?
Hi, Apparently when I use the following code I am creating a matrix with 15x15 pixels. dmin1=2; n=15; manhattan=ones(n,n,3)...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
What does mean .* and ' ?
Hi, It seems that in MATLAB exists the notation .* that seems to be an operation and the notation ' that is used apparently wit...
plus de 4 ans il y a | 3 réponses | 2
3
réponsesQuestion
GUIDE Handle not updating
Hi, I am using the following code. function antennaId_Callback(hObject, eventdata, handles) % hObject handle to antennaId ...
plus de 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
Add transparency to colormap
Hi, How can I add transparency to a colormap 2D? I have the following code and I am using the version R2016a of MATLAB. funct...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Transforming a matrix in an image
Hi community, I am transforming a matrix in an image, but when I try to see the green and blue components of the image a get th...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How can I tri sectorized an antenna?
Hi, I need to make a radio planning tool in MATLAB. In other words, I need to put antennas, see them coverage, etc. How can I ...
plus de 4 ans il y a | 1 réponse | 0
0
réponseQuestion
Trying to save the red positions of an image
Hi, I'm trying to save all the position's of an image with red color. im = imread('image.png'); locations = find(im(:,:,1) ==...
plus de 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
Error in matrix to image
Hi community, I've created a matrix with structures. This structures are antennas. %Vertical ant.elevation = Vertical.Elevati...
plus de 4 ans il y a | 1 réponse | 0
0
réponseQuestion
How to associate a rectangle with a struct?
Hi there Community, I have the folllowing image and the antenna: [Horizontal,Vertical,Optional] = msiread(strcat(pathName,file...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
Error with Measure Distances in an Image
Hi! I was using the code presenting in this documentation https://www.mathworks.com/help/images/measure-distances-in-images.htm...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How to make a matrix of zeros and ones with a specific distance between each one?
Hi! I need to make a matrix of zeros and ones with a specific distance between each one. This distance is an input value, which...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How to make a grid with an angle of 60 degrees and a variable distance between axis?
I need to make a grid in a image with an angle of 60 degrees and a distance between axis that can be changed. Any suggestion...
plus de 4 ans il y a | 1 réponse | 0
0
réponse
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